Liner puller



My l2 w33 J. J. SANTIAGO 1,804,843

LINER FULLER Filed Dec. 14, 1929 2 Sheets-Sheet l May 12, 1931 J. .1.SANTIAGO 1,804,843

LIN

d Dec. 14. 1929 2 Shee tttttt et 2 Patented May 12, 1931 UNITED STATESPATENT OFFICE JAMES J. SANTIAGO, 0F LOS ANGELES, CALIFORNIA, ASSIGNOB TOJOHN GRANT, OF LOS ANGELES, CALIFORNIA LINER FULLER Application ledDecember 14, 1929. Serial No. 414,073.

This invention relates to tools and appliances commonly known as linerpullers and whose general function is to engage with and pull a sleeveor liner, such as the liner of a pump cylinder. Although, as will bereadily understood, the invention may be used for other specificpurposes, its nature and operation are best set out by description of itdesigned for and applied to the specific pur pose of pulling pumpliners.

Several difficulties are encountered in pulling pump liners, especiallywhere they have been long in place and perhaps rusted or corrodedtightly. Some such liners are comparatively thin-walled, and, if engagedat the inner end only, may tend to buckle or otherwise deform so astorender removal very difficult. And, furthermore, such liners are usuallyplaced in a cylinder casing having a ribbed wall, so that the liner isnot in contact with the cylinder casing over its whole exterior surfacebut is only supported by spaced ribs. If a liner puller is of such acharacter as to exert localized outward pressure on the inner surface ofthe liner, the liner may be deformed and pressed outwardly into thespaces between ribs, which again makes the removal very difficult.

It is a general object of this invention to provide a liner puller whichobviates these and other difficulties; and to provide a liner pulleradjustable to liners of various sizes, and which, properly adjusted andapplied to the liner, supports the liner against any possibledeformation or collapse and ldoes not exert upon it any localized forcestending to deformation.

In the following detailed description, I

set out a preferred and illustrative form of liner puller embodying theinvention, and from this detailed description an understanding of theinvention itself may be had., It will be understood that the specificform herein set out is merely illustrative of the invention and is notintended to be a limitation upon it except as the invention isdefinitely limited by the appended claims.

In the drawings l Figure 1 is a view showing a typical cylinder and'liner in longitudinal section, and

my liner puller in elevation and section, and 1n the position applied tothe liner ready for the pulling operation.

Fig. 2 is a similar view showing the liner puller in such a position asit assumes on being inserted to or removed from the position of Fig. 1.The longitudinal views of Figs. 1 and 2 are taken on such a line as isindicated by line 2 2 on Fig. 3;

Fig. 3 is a cross-section on line 3-3 of Fig. E3; and

Fig. 4 is a detailed cross-section on line 4--4 of Fig. 1.

In the drawings let 10 designate a typical cylinder and 11a typicalliner therein. The liner is shown supported in the cylinder on annularinternal ribs 12. This spaced support of the liner in the cylinder, insome form or other, is prevalent in the use of liners.

The liner puller illustrated and described here comprises a plurality ofliner eng ging shoes 13, which may be of any suitable number and arehere illustrated as three. These shoes are preferably elongate membershaving their outer liner engaging faces 13a curved to conform at leastapproximately, and preferably accurately, to the internal curvature ofthe liner to be pulled; and they are thus adapted to obtain flatpressure contact with the inner surface of the liner.y Although I preferto depend primarily upon end engagement and direct endwise pressure toremove the liner, and thus provide each shoe with an end lug 14, it iswithin the scope of my invention vto provide the curved surfaces 13a ofshoes 18 with teeth 13b, such as are illustrated in Fig. 2 only. By theuse of such teeth, pulling engagement may be had with-the inner surfaceof the liner, either to help the pulling engagement of lugs 1li or evento the complete exclusion or disuse of those lugs.

Liner engaging shoes 13 are A pivotally mounted at 15b near theircenters on sets/of toggles 15, of which there are four for each shoe.One end of each toggle is pivoted to a shoe and the other end of eachtoggle is pivoted at 15a to a traveling nut 16. From an inspection ofthe iiguresit will be seen, without the necessity of protracteddescription,

how each shoe has two toggles which are pivotally connected with onetravelingnut 16 and has two other toggles pivotally connected with theother traveling nutl16; and how, b moving the nuts 16 toward or awayfrom eac other the angular relation of the toggles may center arbor 21,and the other on a righthanded thread 19 of that arbor; so that rotationof the arbor in either one direction or the other, the nuts may beadvanced toward each other or moved away from each other to expand oiIcontract the shoes.

To the outer end of arbor 21 an operating shaft 22 is connected. Thisconnection may be made in any suitable manner, but a convenient manneris by rovidin the operating shaft with an interna screw t rea-ded socket23 which takes the outer screw-threaded end of arbor 21, a lock nut 24or any other suitable means being employed for locking the socketnon-rotatively on the screw-threaded arbor. i

vOperating shaft 22 is of a suitable length for the len h 'of the liner,or the average lengths of liners, to be pulled; and for other lengthsother operating shafts may be substituted. The outer portion of theoperating shaft is screw-threaded as shown at 25 an near its outer endit carries an operating nut 26 screw-threaded upon it. This nut 26 maybe provided with any suitable means for facilitating powerful rotation.For instance it may have a disk or flange 27 provided with radialsockets 28 for the insertion of a capstan bar or the like.

Between the operating nut 26 and the cylinder there is a spider 30 withlegs 31 adapted to bear upon the cylinder end. The legs 31 areillustrated in Fig. 1 as broken and contracted in length. In practicethey are of such lengths, parallel with the axis of the tool and of theliner, that the liner may be completely pulled from the cylinder withoutcoming into contactvwith the radial arms 32 of the spider. l

The spider has a hub 33 with a bore 34 slidably passing the screw shaft22, but the spider is not screw-threaded upon the shaft. The shaft has alongitudinal splineway 35 and the spider hub 33 has a spline or key 36sliding longitudinally in the splineway-see Fig. 4. Thus, by meansofrotating the spider,

operating shaft 22 and arbor 21 may be rotated without being given anylongitudinal movement.

The operation of the'device will now be easily understood from theforegoing descripltion. When first applied the parts are init ecollapsed position such as shown in Fig. 2, so that the liner engagingshoes may easily pass' through the liner. The spider 32 `has been set ainst, or substantially against, the end ogn the cylinder, and the otherparts are pushed lengthwise into the liner by pushin inwardly on theoperating shaft 22 or on t e nut 26. Fig. 2 shows the parts collapsedand longitudinally inserted almost to the proper point for expansion.

After the parts have been longitudinally inserted as far as is shown inFig. 1, then, before the nut 26 is set u against the spider, the spider30 is rotated) in such a direction as to move traveling nuts 16 towardeach other and thus expand the liner enga 'ng shoes to the positionshown in Fi 1. onsiderable outward pressure mav exerted by the linerengaging shoes i so desired. Then the operating nut 26 is run u againstthe end thrust bearing 40 whic is located in the outer part of thespider, and continued forcible rotation of the'operating nut then pullsoutwardly on the operating shaft and arbor and shoes, and thus forciblypulls the liner out of the c linder. During this operation considera lelongitudinal pressure, or end pressure, may have to be brought to bearupon the liner; and if the liner is thin or weak, the internal supportgiven it by the long evenly ressing shoes will prevent its rupture oreformation.

After the liner is pulled from the c linder, the device is easilyremoved from t e liner by operations and reverse of those beforedescribed.

I claim:

1. A liner puller or the like comprising a pluralit of liner engagingshoes, mounting means or said shoes including a rotatable arbor andmeans whereby rotation ofthe arbor in o posite directions will contractand expan the shoes, a screw-threaded o erating shaft forming anextension of said arbor, a cylinder engaging s ider through fwhich saidoperating shaft is s idable, and an operating nut screw-'threaded on theo erating shaft and bearing against-the spi er.

2. A liner puller or the like comprising a pluralit of liner engagingshoes, mounting means or said shoes includin a rotatable arbor and meanswhereby rotation of the arbor in opposite directions will contract andexpand the shoes, a screw-threaded operating shaft forming an extensionof said arbor, a splined cylinder engaging spider through which saidoperating shaft is slidable but not rotatable, and an operating nutscrew-threaded on the operating shaft and bearingagainstthespider'.

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3. A liner puller or the like comprising a pluralit of liner engagingshoes, mounting means or said shoes including a rotatable arbor andmeans whereby rotation of the arbor in opposite directions will contractand expand the shoes, a screw-threaded operating shaft forming anextension of saidarbor, a cylinder engaging spider through which theoperating shaft extends, said spider being splined to the operatingshaft to be non-rotating but slidable with reference thereto, and anoperating nut screw-threaded` upon the operating shaft and bearingagainst the spider.

4. In a liner puller or the like a. central arbor having right handedand left handed screw threads, a pair of traveling nuts screwthreadedlengagin respectively, with the right an left han ed threads, togglelinks pivoted to ether and pivoted in pairs between said trave 'ng nuts,liner engaging shoes pivotally mounted at the inter-pivotal points ofthe toggle links, a screw-threaded operating shaft forming acontinuation of the arbor and rotatively connected thereto, a cylinderenga 'ng spider through which the operating s aft passes, and anoperating nut screwthreaded upon the o erating shaft and bearing againstthe spi er.

A 5. In a linerpuller or the like, a central arbor havin right handedand left handed screw threa s, a pair of traveling nuts screwthreadedlyengaging, respectively, with the right and left handed threads, togglelinks pivoted together and pivoted in pairs between said traveling nuts,liner engaging shoes pivotally mounted at the inter-pivotal points ofthe toggle links, a screw-threaded operating shaft forming acontinuation of the arbor and rotatively connected thereto, a cylinderen aging spider through which the operatin 's aft passes slidably, thespider bein splin to the shaft so that the spider an shaft arerelatively non-rotatable, and an operating nut screw-threaded upon theopenating shaft and bearing against the spider.

6. In a liner puller or the like, a central arbor'having -right handedand left handed screw-threads, a pair of traveling nuts screwthreadedlyengaging, respectively, with the right and left handed threads, togglelinks pivoted together and pivoted in pairs between said traveling nuts,liner engaging shoes pivotall;r mounted at the inter-pivotal points ofthe toggle links, a screw-threaded operating shaft forming acontinuation of the arbor and rotativell connected thereto, a cylinderengaging spidI r through which the operating shaft passes, and anoperating nut screwthreaded upon the operating shaft and bearing a instthe spi er; said liner engagin shoes ing elongate in the axial directiono the arbor and having curved outer liner engaging faces.

7. In a liner puller or the like, a central arbor havin right handed andleft handed screw threa s, a pair of traveling nuts screwthreadedlyengaging, respectively, with the rightl and left handed threads,- togglelinks pivoted together and pivoted in pairs between said traveling nuts,liner engagmg shoes plvotally mounted at the inter-pivotal points of thetoggle links, a screw-threaded operating shaft forming a continuation ofthe arbor and rotatively connected thereto, a cylinder engaging spiderthrough which the operatmg shaft passes slidably, the spider beingspline to thel shaft so that the spider and shaft are relativelynon-rotatable, and an operating nut screw-threaded upon the operatingshaft and bearing against the spider; said liner engaging shoes eingelongate in the axlal d1- rection of the arbor and having curved outerliner engaging faces.

8. In a liner puller or the like, a plurality of elongate liner engagingshoes, means f or pivotally supporting the shoes in the1r medlalportions, means associated wlth the shoe supporting means for forcingthe shoes away from each other and into ex anded liner engagingposition, and means orexertlng endwise force on the shoes supportlngmeans for the purpose of pulling a liner engaged by the shoes.' s

In witness that I claim the foregoing I have hereunto subscribed my,name this 9 day of December 1929.

JAMES J. SANTIAGO.

